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Wilhelm His, Sr. (1831-1904)
By: Kimberly A. Buettner
| Published: Nov 01, 2007
Wilhelm His, Sr. was born on 9 July 1831 in Basel, Switzerland, to Katharina La Roche and Eduard His. He began his medical studies at Basel in 1849…
PeopleBiographyHuman Development
Twin-to-Twin Transfusion Syndrome
By: Corinne DeRuiter
| Published: Aug 16, 2011
Twin-to-Twin Transfusion Syndrome (TTTS) is a rare placental disease that can occur at any time during pregnancy involving identical twins. TTTS…
Fetofetal TransfusionReproductionFetusCongenital DisordersHuman Development
Nuclear Magnetic Resonance Imaging to Visualize Fetal Abnormalities
By: Dasia Garcia
| Published: Jun 21, 2017
Nuclear magnetic resonance imaging (MRI) is a technique to create a three-dimensional image of a fetus. Doctors often use MRIs to image a fetuses…
TechnologyMagnetic resonance imagingNuclear Magnetic ResonanceFetusDiagnostic ultrasonic imaging
Epidermal Growth Factor
By: Adam R. Navis
| Published: Oct 30, 2007
Epidermal growth factor is a signaling molecule that stimulates the growth of epidermal tissues during development and throughout life. Stanley Cohen…
Levi-Montalcini, RitaHamburger, Viktor, 1900-2001EmbryologyEmbryosDevelopmental Biology
Jacques Loeb (1859-1924)
By: Steve Elliott
| Published: Jun 10, 2009
Jacques Loeb experimented on embryos in Europe and the United States at the end of the nineteenth and beginning of the twentieth centuries. Among…
PeopleParthenogenesisBiography
Theodora (Theo) Emily Colborn (1927-2014)
By: Alexis Abboud
| Published: Dec 30, 2014
Theodora Colborn studied how chemicals affect organisms as they develop and reproduce during the twentieth and twenty first centuries in the US. By…
endocrine disruptorsEndocrine disrupting chemicalsPollutantsEndocrine toxicologyEndocrine System
Assisted Reproductive Technologies
By: Tian Zhu
| Published: Jul 22, 2009
Assisted reproductive technologies (ART) are a collection of different techniques designed to help those who are infertile achieve a successful…
TechnologyReproductive Techniques, AssistedReproductionFertilization
"Sheep Cloned by Nuclear Transfer from a Cultured Cell Line" (1996), by Keith Campbell, Jim McWhir, William Ritchie, and Ian Wilmut
By: Zane Bartlett
| Published: Sep 19, 2014
In 1995 and 1996, researchers at the Roslin Institute in Edinburgh, Scotland, cloned mammals for the first time. Keith Campbell, Jim McWhir, William…
CloningClone CellsCloning, MolecularCloning, OrganismExperiments
Bernard Sachs (1858-1944)
By: Tiffany Nardi
| Published: May 31, 2017
Bernard Sachs studied nervous system disorders in children in the United States during the nineteenth and twentieth centuries. In the late 1880s,…
Tay-Sachs DiseaseAmaurotic Familial IdiocyGangliosidosesNervous system--DegenerationNeurodegenerative Disorders
Seed Banking 1979-1994
By: Marci Baranski
| Published: Jan 28, 2014
In the early twentieth century, scientists and agriculturalists collected plants in greenhouses, botanical gardens, and fields. Seed collection…
ContextGermplasm resources, PlantGermplasm resources, Plant--StorageAgrobiodiversityCrops